期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 12, 页码 6526-6533出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06710j
关键词
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资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2007-0056091, 2012R1A1A3013893, NRF-2014M3A7B4050960, NRF-2014M3A7B4051745, NRF-2014M3A7B4051749]
- Priority Research Centers Program through the NRF - Ministry of Education, Science and Technology [2009-0093823]
- Pioneer Research Center Program through the NRF - Ministry of Science, ICT & Future Planning [2010-0019550]
We investigated the thermoelectric properties of polymer composites based on a conducting polymer and carbon materials with various dimensionalities. PEDOT:PSS as a conducting polymer matrix was successfully hybridized with graphene sheets and multi-walled carbon nanotubes through in situ polymerization of 3,4-ethlyenedioxythiophene monomers in an aqueous solution in the presence of the carbon materials dispersed by using a polymeric dispersant. The hybrid structures of PEDOT:PSS, graphene, and carbon nanotubes in the composite showed an electrical conductivity, Seebeck coefficient, and power factor of 689 S cm(-1), 23.2 mu V K-1, and 37.08 mu W mK(-2), respectively, values that are much higher than those of pristine PEDOT:PSS, PEDOT:PSS/graphene, or PEDOT:PSS/carbon-nanotube composites. The thermoelectric figure of merit increased from 0.017 in the pristine PEDOT:PSS to 0.031 in the composite, corresponding to an 80% enhancement. We believe that the enhanced thermoelectric performance comes from the synergic effects of multi-component systems with excellent electrical bridging and electronic coupling between PEDOT and carbon materials.
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